Professional race teams need large race team haulers or transporters to haul vehicles, spare parts and tools to the events. These truck and trailer combos often have two levels. The upper level is for carrying race cars and the lower level is for tools and parts. They also usually have an air conditioned lounge area and sometimes a bath room on the forward, upper deck. On the exterior they can have a large canvas garage area that is set up at race events for hospitality or working on vehicles.